Keysight 34950A User’s Guide 5
Do Not Remove the Instrument Cover
Only qualified, service-trained personal who are aware of the hazards involved 
should remove instrument covers. Always disconnect the power cable and any 
external circuits before removing the instrument cover. 
Do Not Modify the Instrument
Do not install substitute parts or perform any unauthorized modification to the 
product. Return the product to an Keysight Sales and Service Office for service 
and repair to ensure that safety features are maintained. 
In Case of Damage
Instruments that appear damaged or defective should be made inoperative and 
secured against unintended operation until they can be repaired by qualified 
service personnel.